Dog plotz may not be available, but she could use something sticky like Karo syrup.
I don’t have dog plotz available, as people who have dogs are required to clean up after them. There is the occasional land mine from a lazy dog owner but not often.
Syrup could be used, but we don’t have “knobs.” The doors all have the ADA-approved door levers. That wouldn’t necessarily allow him to get it all over his hands.
One thing is for sure: I will start to “lock” the gate at night. It’s just a simple “j” bolt, but put in properly, it can’t be seen. He might still reach the door handle, but he would make a lot of noise doing it.